What does oil viscosity mean?
1 Answers
Oil viscosity is the most important performance indicator for measuring the fluidity of engine oil under various conditions. It mainly consists of two aspects: 1. The lower the oil viscosity, the thinner the oil film, the better the fluidity, and the relatively smaller the resistance to engine operation. 2. The higher the oil viscosity, the thicker the oil film, the weaker the fluidity, and the relatively greater the resistance to engine operation. Methods for selecting oil viscosity: 1. Based on vehicle age New cars should use oil with slightly lower viscosity, and 5W30 would be more suitable. As the vehicle ages, choose oil with slightly higher viscosity. Older car engines experience more severe wear, so relatively higher viscosity oil is needed for a more comfortable and smoother driving experience. In this case, 5W40 would be more appropriate. 2. Based on vehicle series If your car is from Europe or America and consumes too much oil, you can consider fully synthetic oil with slightly higher viscosity. Japanese and Korean cars generally have good sealing, so oil with slightly lower viscosity can be chosen, and 5W30 is a good option. 3. Based on road conditions Road conditions can greatly affect the lifespan of the oil. In areas with poor road conditions, the oil change interval should be shortened. In urban areas with frequent traffic jams and stops during driving, lower viscosity oil is recommended. If you frequently drive long distances or on highways, you can choose 5W40.
